Alexander Koch
@kochalex_
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Figuring out where to put all that carbon. Personal account & views are own. 🌍
Sweden
Joined June 2013
New paper by @damon_matthews, @KirstenZickfeld, @amyluers, @kochalex_ presents an approach to tonne-year accounting to effectively quantify and track the #climate value of temporary and permanent land #carbon #storage. @Concordia
nature.com
Nature Communications - Efforts to retain or increase land carbon pools are hampered by the risk of loss to natural or human disturbances. The proposed approach to tonne-year accounting could...
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This is a great new paper by @damon_matthews that use tonne-years but crush the traditional way of using it and say: 🚫 It should not be used for offsetting CO2 ↗️ Should last beyond peak temperature https://t.co/7T5Jnkr6E9
nature.com
Nature Communications - Efforts to retain or increase land carbon pools are hampered by the risk of loss to natural or human disturbances. The proposed approach to tonne-year accounting could...
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I just published El Niño is coming — what this means for 1.5°C
link.medium.com
A medium-to-strong El Niño is forecasted for 2023–24 that could cause global average temperatures to surpass the Paris target of 1.5°C…
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🚨🌍 Global Carbon Budget 2022, out now!🌍🚨 It provides the latest update on how we humans have tampered with Earth's remarkable system of #carbon stocks and flows. So what are the take-homes from our latest update? @gcarbonproject @PFriedling
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Insightful commentary on https://t.co/Lu4pMv3hxV (not to be mistaken with REDD+) by my colleages @TroveResearch
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This is really important stuff. Admittedly I've made that mistake before, too. We need to consider the people who live on the "restorable" land.
How do we decide where we should focus ecological restoration? A recent paper in @nature by Strassburg et al. provided advice that mostly ignored people. We think this is wrong, and Nature has now (finally!) published our response.
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Avoid, enhance, aaaand then restore... 🌳
New paper! Showing that nature restoration can be done while minimising land-use change. This means we don’t need to plant a #trilliontrees, displacing people and food systems, we need to restore degraded ecosystems… 1/2
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Carbon removal should be defined as carbon permanently removed. I & @hausfath @KDHoll5 @brunncy @kochalex_ Natalya Jarlebring argue for the need to separate solutions that restore carbon in the short carbon cycle from those that permanently store it away https://t.co/lAhGJEdeXh
climatechangenews.com
Planting trees is a key pillar in the fight against climate change but it's no substitute for permanently removing carbon dioxide from the air
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My News & Views on "Future reversal of warming-enhanced vegetation productivity in the Northern Hemisphere" by Yichen Zhang and colleagues -
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Our paper led by Fangyuan Hua is out in @ScienceMagazine! Headline: native forest restoration results in better provision of most ecosystem services, but not timber production when compared to plantations. See🧵for detail 1/14
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Super excited about this summary in National Geographic online by @CraigAWelch about my paper in @OneEarth_CP with Pedro Brancalion about which #tree growing programs to support
Everyone, it seems, wants to fight #climatechange w/trees. But tree-planting orgs lack transparency. Some are, essentially, greenwashing. Others mean well but have serious issues. Some actually do damage. So how do u know which to support? Me for @natgeo
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Does anybody know why LU emissions in SSP3 decline after 2020 despite ongoing deforestation, cropland expansion and little/no mitigation? Maybe @DetlefvanVuuren or @Peters_Glen?
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Our new blog post summarizes two recent comment letters about @VerraStandards’ proposed use of ton-year accounting to issue carbon offset credits — including for delays in CO₂ emissions that are as short as a single year. (1/11)
carbonplan.org
We summarize two recent comment letters about Verra’s proposed use of ton-year accounting to issue carbon offset credits — including via a proposed methodology developed by NCX which would credit...
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Reforestation and surface cooling in temperate zones: Mechanisms and implications https://t.co/ggaPMpZB6i
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In the intro of a peer-reviewed (?) paper: "The frequency of extreme climate events, such as hurricanes, tsunamis, heat waves, and heavy precipitation, have also increased significantly[...]." TSUNAMIS??!! 🧐🤯
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There's lots more to unpack. But I'm not the fastest tweeter so stay tuned and check out what @jedokaplan has to say.
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What if you're strapped for resources and can only restore 50% of the available area? Restore the locations promising highest C uptake under today's climate but if you can take into account future climate change impacts - it'll yield in ~5% more carbon stored by 2100.
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To account for uncertainties around CO2 fertilization we ran two experiments - (1) with CO2 changing 2015-2100 and (2) with CO2 fixed at 2014 levels. In (1) C accumulation increases w. CO2 levels, in (2) C accumulation decreases w. climate change severity.
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We limit our "restoration" extent to pasture/non-cropland that's considered restorable based on @bronsongriscom's 2017 area of opportunity; resulting in 124 Mha restorable land in the tropics.
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We used LPJ-LMfire, a middle-of-the-pack vegetation model when it comes to reproducing tropical productivity and biomass, driven by 4 climate change scenarios each with climates from 13 CMIP6 models -> covering a wide range of potential future climates
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